Sectional chip breaker



Jan. 5, 1954 J. s. BALLANTINE SECTIONAL CHIP BREAKER 2 Sheets-Sheet 1Filed May 17, 1949 J. S. BALLANTIN E SECTIONAL CHIP BREAKER Jan. 5, 19542 Sheets-Sheet 2 Filed May 17, 1949 lllrllll Patented Jan. 5, 19542,664,931 SECTIQNAL: CHIP BREAKER. am s. Bal an n bso nr N 'ApnlicationMay li', 1949, Serial No. 93;702

screen 01444-444) The present ntent on re atess-to sect ona hip rs forwo dplaninemachines and theike d m g n ral t improteithee on truc on andoperation of devices. of this..type.;

A primary object of the invention is .theprovision'of a sectional chipbreakerofimproved construction and operation for planing. machineswherein the possbility of fragments of wood such as chipsand the likebecoming lodged-into the working parts of the machine to disruptoperation thereofis substantially minimized and wherein means areprovided for automatically comminuting' chips-orthe like which mayaccidently lodge in certain parts of the machine subject to be adverselyafiected thereby.

A further object of the invention is the provision of asectional chipbreaker of novel and simple construction in whichparts of the devicelikely to be adversely afiected by chips and the like arepartly enclosedand shielded from flying chips.

A still further object of the invention is the provision of a sectionalchip breaker of improved construction wherein the weight of the deviceand its pivotal mounting insures intimate contact of the chip breakerswith the material being processed and wherein the chip breakers aremounted for individual and/or collective yielding movement in responseto the surface characteristics of the material being processed.

Another object of the invention is the provision of a sectional chipbreaker in which chips or fragmentsof wood which accidently penetrateinto certain parts of the machine likely to be damaged or obstructedthereby are automatically comminuted to thus eliminate the possibilityof such damage or obstruction.

These and other objects and advantagesv of the invention will beapparent from a consideration of the accompanying drawings and appendedspecification which illustrate and describe apreferred embodiment of theinvention.

In the drawings:

Fig. l is a plan view showing portionsof a planing machine with myimproved chip. breaker attached thereto;

Fig. 2-is, a plan view; of the chip breaker;

Fig. 3 is a front elevational view of the chip breaker as viewed fromthe bottom in Fig. 2;

Fig- .4 is a vertical cross-sectional view of the chip breaker taken onthe line 44 of Fig. 1;

Fig. 5 is a plan View of the cutter ring;

Fig. 6 is a vertical cross-sectional View of the cutter ring taken onthe line 5- 5 of Fig. 5;

Fig. 7 is a vertical cross-sectional View similar to Fig. 6 of amodified form of cutter ring; and,

Fig. 8 isa vertical cross-sectional view similar to Fig; 6 of a furthermodified form of cutter ring.

2: In accordanc wi h; th present invention :the mpr ved.- ohipbreakerdevice I llcomprises a. plus a ty of individualpresserreet it adaptedtotrest' n. ap ank. ortherl ke betweenitneicutterghead l1ndthe.inloedrrollzli ofablaner.- The Dresser et 1 I are than .zeuiiiethewood chips; up: themtoflv-outwsrdlr noomingplank; and: are ndivi u l ymo nted-on a. uide bar. It or war,- oal ye on at d rectan ularorss-seotion; ion limitocbvortioal mov mcnt a commodate local .1.0 0hematerial. suchvas aplank; bei gplaned Add 1.0. merit ofthpressenafeet'is, providcdy.for--by a. pivotal constru tion:comprising1-- armsl5 and -l6 secured to the en s. ot thegnide .bar- Mandepive otally mounted onqt: Divot-pins. .llrand l-81se-- Cured inho-sid immemombers .l 9 "and: :2 Over the pianerv Thus.smallervatiationsin. thickness ofthe ,rnaterialabe' k-out-areautomatically-accommodated by-t o: dividual press rwhile..-l,argervariations. inthi kn ss are accommodated.- by the clockwisepivoting of the chip breaker In about the .pivot Downward movement orthe: nresseri'eet-l his limited y -an-.zadinstablawstop; device.-comprisin adjustable screw -21: nd 121:..scre th carr odbyproiect nems-Mandi: -t bar u and adapted tov en a e. protecting; stops 25 an 26.secured. to thefsid frama-memberssl 9 nd 20;; For normal; operation:the-.adjustable s p device is; adiustod :so. that. the lower boa-rd cntacting 'surfacesvct the: presser wfeet; I. 1 are positioned somewhatbelow; for; example: onesixteenth" ofsanzin h; below the-zlowestsportionof the euttingioirol'e of.atheycutterrhead1:2:

Theprosso toot I: comprise abodxportionil and afoot-porn. :...-.2.&sThe'footpcrtion 2'a=.eX': tends downwardly and rearwardly from;v thebody portion-21".andbaswa; lowenboard-engaging surface 29 andunperxourvodx chin nidingzsnrface 30;. urve rob-in uiding; surface.- 3.0forms;v a continua ion -of; the .rearwardly memes surface or thabody-portion- 21 and;- serves; :in onjunc i n therewith; to: 'guide anddirect: the chip pwardly; in th lmaohines.

As pointed out hereinberore the Dresser-feet fl 1. are, individuallymounted on the guide bar M: or vertically.elongatedrectan ularCI'OSSwSGOfiQD for limited vertical movement; response to localvariations in thickness of a board..being.= out; For hi purpose. therearside ofz-thabodr portion; 21 pp s t th -r arW rQIri-n Iin. .zobip euidne u-m face 3| is out;Outsta-formra'zu-shapedrectan ular recess oropening-13,2. -andtupper and; lower-mm jectingfianged portionsorwalls 33and, The recess -32 isshaped :tohousathc. guide. bar- .I 4 andissomewhat, longerin itsvertioalldimension. than verticalrmovementofthein:

the vertical thickness thereof to permit the desired limited verticalmovement of the chip breaker thereon. The inner wall of the recess formsa bearing surface having sliding enga ment with one side of the guidebar. The presser feet are held in position on the guide bar M by bolts35 which pass through aligned vertical bores 36 and 31 in the flanges 33and guide bar [4 respectively and are screw-threadedly engaged withthreaded vertical bores 38 in the flanges 34 aligned with the aforesaidbores. Springs 39 surround the lower ends of the bolts 35 and have oneend thereof seating against the upper ends of the enlarged counterbores40 in the lower portion of the guide bar 14 and the other end thereofseating against the flange 34 of the body portion 21'. The upperportions of the springs are housed within the counterbores. In theconstruction shown the bolts 35 are freely slidable in the openings 31of the guide bar l4 so that the presser feet II can at all times moveupwardly against the action of springs 39 in response to unevenness inthe material being cut.

As will be apparent from the description thus far, the mounting of thepresser feet II is so arranged that the elements thereof which arelikely to be clogged and/or obstructed by chips, sawdust, and the likeare substantially shielded from the path of movement of such chips andthe like so that clogging is reduced to a minimum. However, in theabsence of complete enclosure, par ticles may sometimes seep into theworking parts and prevent proper functioning of the device. This isparticularly true in the case of particles. chips, and the like whichmay lodge between the lower surface of the upper flanges 33 and theupper surface of the guide bar l4 since the presence of such particlesprevents proper seating of the presser feet with consequent inefficiencyof operation.

In accordance with the present invention the possibilities of suchclogging action are substantially eliminated by the provision ofsuitably shaped metallic rings 4| loosely surrounding the bolts 35between the flanges 33 and the guide bar l4 and designed to comminutechips lodging in such areas and cause them to fall out under thevertical vibrating movement between the two parts. The metallic rings 4|are preferably hexagonal in cross-sectional shape as shown in Figures 5and 6 but may alternatively be diamond shaped or square as shown by therings 42 and 43 of Figures '7 and 8 or other desired shape which willprovide opposite sharp edges disposed for coaction with the opposingsurfaces of the flanges 33 and guide bar l4.

In the operation of the device, as a board or the like advances underthe presser feet H, the latter will move vertically against the actionof the springs 39 and thus adjust themselves to any unevenness in thesurface of the lumber. Vertical movement of the presser feet H islimited to the flanges 34 striking the lower edge surface of guide barl4. Thus if the unevenness of the lumher is such as to require avertical movement of the presser feet greater than this, the entiremechanism will pivot about the pivot pins 11 and I8. Such pivotingmovement is resisted by the weight of the chip breaker mechanism whichis designed to correctly tension the springs 39 to exert the desiredbearing pressure. Suitable weights or the like may be used to secure thedesired tension of the springs 39. Thus upward vertical movement of theindividual chip breakers is resisted in the flrst instance by thesprings 33 and in the second instance by a part or all of the weight ofthe entire mechanism. Hence the possibility of damage to the mechanismby the uneven character of the stock being cut is substantiallyeliminated.

Furthermore, the possibility of clogging the machine by chips or thelike is substantially diminished by a construction in which the partslikely to be clogged are substantially enclosed and shielded from theflying chips. And finally, stray chips which do lodge in the areabetween the flanges 33 and guide bar H are rapidly comminuted anddischarged so as not to interfere with the proper functioning of thedevice.

Various modifications of the invention described and illustrated willmost likely occur to those skilled in the art to which the inventionrelates and may be made without departing from the spirit of theinvention, the scope of which is indicated in the attached claims.

I claim:

1. A chip breaker comprising a guide bar, a plurality of presser feetmountd on said guide bar, each of said presser feet having a recesstherein for receiving said guide bar, the width of the guide bar beingless than the length of the recess in each presser foot, alignedopenings in said guide bar and each of said presser feet, pins disposedin said aligned openings for mounting said presser feet on the guidebar, a ring mounted on each of said pins between the guide bar and awall of said recess, said ring being shaped to comminute chips and thelike lodging in such area, and resilient means for urging each of thepresser feet downwardly.

2. A chip breaker as set forth in claim 1 in which said ring ishexagonal in cross-sectional shape.

3. A chip breaker as set forth in claim 1 in which said ring is diamondshaped in cross-sectional shape.

4. A chip breaker as set forth in claim 1 in which said ring is squarein cross-sectional shape.

5. A chip breaker comprising a guide bar, a plurality of presser feetmounted on said guide bar, each of said presser feet having a recesstherein for receiving said guide bar, the width of the guide bar beingless than the length of the recess in each presser foot, alignedopenings in said guide bar and each of said presser feet, pins disposedin said aligned openings for mounting said presser feet on the guidebar, a chip displacing hard element interposed between the opposingsurfaces of the upper wall of the recess of each of the presser feet andthe upper side of the guide bar, said chip displacing elements embracingthe pins and being mounted for movement relative to both said opposingsurfaces and adapted to prevent accumulation of chips in the recess inthe area of said opposing surfaces.

JAMES S. BALLANTINE.

References Cited in the file of this patent UNITED STATES PATENTS

